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Overclocking to ~4GHz

There was a thread about "us" (Finns) and someone replied he knows Finnish people are tough overclockers. Well, here at Assembly (demo parties) two local guys went to the maximum. They overclocked their system to 4.029Ghz with liquid nytrogen.

Rumours tells that after overclocking to ~4Ghz, they started to play Windows Solitaire with it.

It's not that amazing. I mean the Pentium 4 core can be designed up to 10GHz if Intel wished to keep the P4 around that long. So until once they reach that theortetical maximum with the P4 core, they'd have to design a new CPU core.

I'm still using a 1.8a haven't changed it in over 6 months The most I've overclocked it to with good stability is 2.47 but I can't be bothered with the fan noise and watercooling is still just an expense I can't justify.

The thing with LN2 is that it's temporary, overclocking is all about etting stable high speeds not making a machine boot at the highest possible. Still I remember when - another Finnish dude no doubt - sent the first Northwood to 3.7Ghz, probably the first time anyone took notice of the P4 in overclocking circles.

Notice Intel did this same test - ish - but only use watercooling, just shows what the core is capable of.

I saw an experiment once where a metal ring was coole with liquid helium, an electric current was added for a short time, this then continued to run around the ring for several minutes.
A problem with using LN2 is cooling other bits such as the clock generators, resistors and caps on the board too, you've got to to make a kind of clay cup with a cold plate to pour the nitrogen into.